有源耦合电感倍压的高电压增益变换器

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为了提升基本Boost变换器的电压增益,降低开关器件电压应力,提出一种基于耦合电感倍压的有源开关电感高增益变换器。变换器中两个耦合电感的原边组成有源开关电感结构,并引入二极管-电容支路作为无源钳位回路用来吸收漏感能量。利用变换器漏感等效电路模型分析了变换器工作模态,采用伏秒积平衡方法推导得到了变换器电压增益,并给出开关管和二极管电压应力。分析表明,两个耦合电感倍压单元可提升变换器的电压增益,耦合电感匝数比越大、耦合度越大,电压增益也越高,开关管的电压应力也越低。实验样机测试结果验证了理论分析的正确性,表明
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